Mate Puzzle (1160)

After the setup move Ka1, it is Black to move. Find the forcing continuation before checking the solution.

Position after Ka1. Black to move.

Puzzle ID

0Fhlb

Rating

1160

Side to move

Black

Themes

Mate, Mate in 2, Middlegame

Material

White is ahead by 1 point

FEN

3r2k1/2R3pp/8/1N6/1P6/P1Nn2P1/3n1r2/K6R b - - 4 26

What to look for

Calculate a forcing checkmate sequence.

26... Nb3+ 27. Kb1 27... Rb2#

The full forcing line from the source position is:

26. Ka1 26... Nb3+ 27. Kb1 27... Rb2#